Smoke-consuming apparatus.



No. 744,905. PATENTED NOV. 24, 1903. W. G. COURTS.

SMOKE GONSUMING APPARATUS. APPLIOATION FILED M10. 4, 1902.

N0 MODEL.

WITNES S'- V INVENTOR UNITED STATES fPatented November 24, 1903..

PATENr Urrrcn.

IVILLIAM CHARLES COURTS, OF MANCHESTER, ENGLAND.

SPECIFICATION forming part of Letters Patent No. 744,905, dated November24, 1903.

Application filed December 4, 1902. Serial No. 133,921. (No model.)

To aZZ whom it may concern:

Be it known that 1, WILLIAM CHARLES OoURTs,a subject of the King ofGreat Britain, and a resident of Manchester, in the county of Lancaster,England, have invented new and useful Improvements in Smoke-ConsumingApparatus, of which the following is a specification.

This invention relates to smoke-consuming apparatus for boiler-furnacesand the like in which air is supplied to the furnace above the fuelcharged on the grate, through hollow frames arranged at the sides andabove the fire-door; and it consists in an improved arrangement orconstruction of the nozzles or twyers through which the air passes fromsaid frames into the furnace, the object of the invention being todistribute the air through the whole furnace and direct it moreparticularly to those parts of the grate and furnace where the greatestquantity of smoke is produced or accumulates and to obtain an intimatemixture of the smoke-gases and air before they reach the fire-bridge.

On the drawings annexed hereunto the improvements are shown applied toan internally-fixed boiler as an example.

Figure 1 shows a longitudinal section of the fore part of the furnacealong line '10 x y c on Fig. 2; Fig. 2, a front view of the hollowframes on the right, and a section therethrough on line "a n, Fig. 1, onthe left; Fig. 3, a plan of the nozzles and dead-plate, Fig. 1; Fig. 4:,an end view of the nozzles as seen from the inside of the furnace.

At the sides of the door-opening a cast'iron air-channels or hollowframes 1) are arranged which extend partly over the door-opening. Airenters them through openings 0 in the dead-plate (1, provided withflap-valves e or with slides, which are opened when the grate d ischarged with fresh fuel and are closed after the fire has become bright.From the frames 12 the air flows through nozzles or tWyers into thefire-box. These nozzles are made long in proportion to their diametersay three to four diameters in lengthin order to impart a definitedirection to the jets of air. They may be formed of separate tubes, butpreferably all the nozzles on one side are combined in one casting f,which extends into the fire-box above the grate, in order that heat maybe stored in them and in the frames 5 while the flaps e are closed andafterward communicated to the air passing through them. The castings fpreferably rest upon projecting ledges g 011 the frames 19 and are eachheld on by a screw h. The several noz zles Z m n o, the number of whichmay be greater or less,are arranged at different angles to thehorizontal and vertical plane in order to direct the jets of air tothose places of the grate or furnace where a large development oraccumulation of the smoke occurs. For instance, as shown, the nozzle lmay be directed toward the center of the crown, the nozzle an upwardtoward the sides of the same, the nozzle n downward toward the middle ofthe grate, the nozzle 0 outward toward the furnace-wall. Obviously anyother direction which may be found advantageous may be given to thesenozzles. By these several jets of air crossing each other at differentheights and angles'also a whirling movement of the heated air and thesmoke-gases rising from the grate is produced, which promotes anintimate mixture of the air and smoke and the complete combustion of thesmoke on the hind part of the grate or behind the fire-bridge.

The conservation of the direction of the several jets of air towarddifferent spots of the fire-box or grate and the mixture of the air andsmoke may be further promoted by dividing each jet into two or more jetsrotating around the axis of the nozzle and each other. This is effectedby inserting into the nozzles partitions 7', formed, for instance, offlatbars twisted around their longitudinalcenter line, so as to producewhen inserted into the nozzle double-threaded helical channels of quickpitch. The total area of the nozzle is not materially reduced thereby.Instead of fiat bars bars of cruciform section may be used, whichtwisted around their axis form quadruple-threaded helical channels. The

longer way the air has to make in passing through these helical channelsincreases the heating effect of the nozzles and along with the rotationimparted to the jet assists to maintain the direction of the jets of airafter they have issued from the nozzles.

In the apparatus represented the air is drawn through the frames 1) andnozzles by the chimney-draft; but obviously it may be forced into themunder pressure or sucked or blown in by means of steam-jets.

I claim as my invention 1. The combination with a furnace having a grateand a fire-door, of hollow frames one .on each side of the fire -doorand extending several nozzles Z, m, n, 0 inclined at various angles tothe horizontal and vertical plane.

3. The combination with a furnace having a grate and fire-door, of adead-plate d having an opening 0 at each side of the door provided withmeans for closing the same, a hollow frame b mounted over each opening 0and extending partly over the door, a casting f fixed to each hollowframe I) and containing several nozzles Z, m, n, 0 inclined at variousangles to the horizontal and vertical plane. and bars 10 twisted aroundtheir longitudinal center line inserted into said nozzles.

In testimony whereof I have hereunto set my hand in the presence of twowitnesses. WILLIAM CHARLES COURTS. Witnesses:

FREDK. J. NAYLOR, EUSTAOE HOOPER TURNER.

